MARK Webber has defiantly insisted he has what it takes to become a formula one world champion despite recent disparaging remarks from his boss, Helmut Marko.

In an interview last month, the company's head of motor sport questioned Webber's mental strength, suggesting the Australian cracks under pressure.

Webber responded in kind by claiming the Austrian has his own agenda, the inference being Marko has sided with reigning triple world champion Sebastian Vettel for a long time. Despite Vettel emerging as champion in the past three years, Webber is in no doubt he can still challenge the German, and at the age of 35 - as he will be later this year - take over the crown.

Driven: Mark Webber of Red Bull Racing. Photo: Getty Images

''I do believe I can have a crack at the championship again this year, as I have done in previous seasons,'' said Webber at Sunday's launch of the team's latest car, the RB9.

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''That is my goal and what I think about each day when I get up, and I'm working hard with the team on doing that.

''They know I need 100 per cent support. You cannot win a world title with only 90, you need 100, and we're going into 2013 with this in place, and I'm comfortable with that.''

Team principal Christian Horner reiterated Webber is given equal support as Vettel, and that there is no favouritism towards the 25-year-old.

''Helmut can be outspoken at times,'' said Horner.

''But if we weren't happy with Mark then we would never have signed him to be with the team for this year.

''We're very happy with Mark and we give both drivers equal opportunity. It's ultimately down to what they do on the circuit.''